Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e47bee454fae436…

MALICIOUS

PDF

84.3 KB Created: 2021-03-27 14:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb28ddfcde39bd0a4ebd4cd82345a2bb SHA-1: 38111599b3dfc630421a528ee1e8843e0db4001b SHA-256: 5e47bee454fae43667238b0edb7a61c574158a1a8e31dfa349615fc93dde7f67
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a critical ClamAV detection and ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a malicious intent to manipulate search engine results or distribute further payloads. The presence of external URIs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/award?keyword=investment+banking+analyst+job+description+pdf
    • http://padlamadla.site/kakodixamenabi8pmae.pdf
    • https://latafixewikokaj.weebly.com/uploads/1/3/4/6/134687196/rosagum-pipisobex-dudopilab-wupejo.pdf
    • http://studyweb.site/chiru_gang_leader_songs_freebfuq5.pdf
    • http://pujesuwidiw.22web.org/just_two_words_puzzle_519.pdf
    • https://semizafug.weebly.com/uploads/1/3/1/8/131871859/3657500.pdf
    • https://bimejijanaki.weebly.com/uploads/1/3/5/9/135986904/3435507.pdf
    • http://garderob-podolsk.ru/sufotaririxamomexazikamu666em.pdf
    • https://burigazipe.weebly.com/uploads/1/3/4/7/134764527/zazerevovepowivi.pdf
    • https://cdn.sqhk.co/lidumezuvir/njaLhjZ/costain_west_africa_plc_annual_report.pdf
    • http://tevaruv.sportsontheweb.net/65959871811.pdf
    • http://subenoji.iblogger.org/61851487443.pdf
    • https://cdn.sqhk.co/bisuligiga/rphgMgj/63012392223.pdf
    • http://koteyarn.moscow/1649687274338uqt.pdf
    • http://lowusonuraku.mygamesonline.org/srimad_bhagavatam_canto_11_download.pdf
    • https://cdn.sqhk.co/bizufunido/VjhhjhD/fobelosise.pdf
    • http://wiinorama.fun/como_agua_para_chocolate_capitulo_3_answers6uqyy.pdf
    • http://nadipasigisapup.22web.org/evenflo_big_kid_amp_high_back_booster_car_seat_walmart.pdf
    • http://boomua.site/wamezukutoz9f13v.pdf
    • https://cdn.sqhk.co/ponesigis/Iifgfgf/cute_drawings_for_your_boyfriend.pdf
    • http://getveran.site/ruzimawgtszx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vawerudarasikow.myartsonline.com/4148761930.pdf
    • http://limufij.myartsonline.com/zipumozejiz.pdf
    • http://tumosavosaruw.rf.gd/juderasilipafipep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107f2.bin
37ea42335ab0c90293a102a4df75ed25f11e9ac312c6fcb3a13c0df9e8ed87b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 5852 bytes
font_01_sfnt_off00011bdd.bin
6c84c533b9cdbd899de568b4bd0a1af9d6de78d5589e31bc2640b22f3d5d5b07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDD 11608 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.